1001668001777 has 4 divisors (see below), whose sum is σ = 1001791504896. Its totient is φ = 1001544498660.

The previous prime is 1001668001773. The next prime is 1001668001797. The reversal of 1001668001777 is 7771008661001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1001668001777 - 2² = 1001668001773 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001668001773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61739393 + ... + 61755614.

It is an arithmetic number, because the mean of its divisors is an integer number (250447876224).

Almost surely, 2^{1001668001777} is an apocalyptic number.

It is an amenable number.

1001668001777 is a deficient number, since it is larger than the sum of its proper divisors (123503119).

1001668001777 is an equidigital number, since it uses as much as digits as its factorization.

1001668001777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123503118.

The product of its (nonzero) digits is 98784, while the sum is 44.

The spelling of 1001668001777 in words is "one trillion, one billion, six hundred sixty-eight million, one thousand, seven hundred seventy-seven".